JP2878705B2 - Collective substation equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a special high-voltage switchgear, a transformer for stepping down from a special high voltage to a special high, high or low pressure, and a special high, high or low pressure switch The present invention relates to a collective substation comprising gears.

(Conventional technology) Hereinafter, a conventional technology will be described using a 66KV / 6.6KV substation facility as an example.

66KV class power receiving equipment is (1) open type (open)
Power receiving equipment, (2) housing type power receiving equipment, (3) gas insulated power receiving equipment (GIS; Gas Insulation Switchgear),
(4) Cubicle type gas insulated power receiving equipment (C-GIS; Cubi)
cle type GIS).

By the way, the open-type power receiving equipment described above is an outdoor power receiving equipment that uses copper insulation and aluminum pipes to connect electrical equipment such as circuit breakers, disconnectors, grounding disconnectors, instrument transformers, and lightning arresters, and uses air insulation. Met. For this reason, since each electric device is arranged and connected linearly, the installation space becomes large,
Also, because of the outdoor air insulation system, the charging part is exposed,
At the time of maintenance and inspection, it was also necessary to shut down the nearby circuits, and there was a problem with high-quality power supply. In heavy pollution areas near metropolitan areas and coastal areas, the above-mentioned housing type power receiving equipment and indoor air insulation were used to reduce flying objects and pollution. However, as construction costs and land prices soar, pollution of live parts, safety, noise,
Due to problems such as high-quality power supply, miniaturization and sealing of the power receiving equipment have been required, and the above-mentioned gas-insulated power receiving equipment has been developed. This is to cover each of the above electrical equipment with a pipe-shaped metal container,
Hexafluoride high pressure as an insulating medium Iougasu (hereinafter SF ₆
(Referred to as gas) and sealed in a small size. The above-mentioned cubicle-type gas insulated power receiving equipment is more reliable, safer, simplifies maintenance and inspection than the above-mentioned GIS, and can be built on a narrow site in a short period of time. It was developed to respond.
This uses low-pressure insulating gas near atmospheric pressure as the insulating medium,
33KV is a package containing all electrical devices in a rectangular container.
It has the same appearance as the following air-insulated switchgear.

66KV / 6.6KV transformers are (1) oil-insulated transformers, (2)
It has been transformed into a gas insulated transformer. In addition, 6.6KV power distribution equipment has been changing along with 66KV power receiving equipment,
Open type and housing are the same, but after that, they are housed together with the main circuit charging part, circuit breaker, disconnector, and other electric equipment in a square metal contact metal container and air-insulated using air as an insulating medium. It has shifted to switchgear. For this reason, three devices could only be electrically connected in order to constitute a substation facility. As an example, FIG. 5 shows a perspective view of a conventional substation facility. It is composed of a 66KV C-GIS1, a transformer 2 and a 6.6KV switchgear 3, and has a decentralized arrangement because it only makes electrical connections.

(Problem to be Solved by the Invention) FIG. 6 is a plan view of FIG. 66KV C-GIS1 and 6.
The 6KV switchgear 3 was a front-rear maintenance switchgear provided with doors at the front and rear. Therefore, the maintenance and inspection space 4 is required for the maintenance and inspection of each device. One of the reasons for the distributed arrangement is the maintenance and inspection space 4. Since the maintenance and inspection space 4 is required, the installation area of the substation equipment is increased, and there is a limit in reducing the area.

Further, due to the distributed arrangement, cable connection work and cable laying pit construction are required for electrical connection of each device on site, which required extra construction time and construction costs.

Therefore, an object of the present invention is to provide a collective substation facility capable of reducing the installation area and the on-site construction period.

[Configuration of the invention]

(Means for Solving the Problems) The present invention relates to a collective substation facility comprising a special high voltage switchgear for power reception, a transformer, and a switchgear for power distribution, wherein the switchgear for power distribution is a front maintenance type, The power receiving special high-voltage switchgear is of a front and side maintenance type, and is physically connected and fixed by abutting the non-maintenance surfaces of the two switchgears, and between the ends of the abutting portions of the two switchgears. The length is made substantially equal, and the maintenance surface of the power distribution switchgear is arranged so as to be on the outer surface of the collective substation equipment.

(Operation) According to the collective substation equipment of the present invention, the special high-voltage switchgear for power reception, the transformer, and the switchgear for power distribution have a clever power distribution configuration, so that the maintenance and inspection space is smaller than that of the conventional collective substation equipment. The size can be greatly reduced, and the cable pit can be shared.

(Embodiment) Hereinafter, an embodiment of the present invention will be described with reference to the drawings, taking a 66KV / 6.6KV substation facility as an example. FIG. 1 shows, as a single-line connection diagram of one embodiment of the present invention, a standard connection example of a special-purpose high-voltage power receiving equipment of a regular spare 2CB power receiving-secondary bank primary DS described in Vol. 29, No. 4 of the Electric Cooperative Research, FIG. 2 shows a plan view of a part of one embodiment of the present invention.

In Fig. 1 and Fig. 2, the collective substation equipment is
66KV switchgear 10, transformer not shown, and power distribution 6.
6KV switchgear 11. Here, the power receiving 66KV switchgear 10 is a 66KV C-GIS, and therefore, in the following description, the power receiving 66KV switchgear 10 is referred to as a 66KV C-GIS.
-GIS10.

The 66KV C-GIS 10 is provided between two 66KV power receiving panels 13 which are disposed apart from each other, and is connected between the 66KV power receiving panels 13 and connects a transformer-transformer (PCT) 12 for transaction instruments provided by a power company. 66K
One V PCT board 14 and one side of each 66 KV power receiving board 13 (second
66KV DS arranged to protrude from the upper side in the figure)
The board 15 has two surfaces. In addition, SF ₆ gas is sealed in each panel unit, making it a transport unit. At the installation site, bolts are tightened in the aerial part of each panel and fixed to the row panel. Each panel accommodates the electrical equipment shown in the single-line connection diagram of FIG.

The 66KV power receiving panel 13 is provided with a door 13a so that maintenance and inspection and operation of the circuit breaker 16, disconnecting switch 17, and ground disconnecting switch 18 housed therein can be performed. A similar example is shown in FIG. Also, 66KV power receiving board
On one side of 13, a side plate 13 b is provided in a portion except for a contact surface with the 66 KV DS board 15, and the side plate 13 b is provided,
A work door 13c for connecting the 66KV cable 19 drawn from the power company to the side plate 13b to the cable head 20
Is provided.

The 66KV PCT panel 14 has a portion protruding from one side of the 66KV power receiving panel 13, and a flange 14a is provided on this portion, and the PCT
It is designed to connect to 12.

The 66KV DS board 15 is provided with a door 15a so that maintenance, inspection, and operation of the disconnector 21 and the grounding disconnector 22 housed therein can be performed. Also, door 15a and 66KV power receiving panel 13
A side plate 15b is provided on the side surface excluding the surface in contact with the side plate 15b.

The lamination method of each of these panels is based on the non-maintenance
d and the non-maintenance surface 14b of the PCT panel 14 are brought into close contact with each other and connected with bolts (not shown). Non-maintenance side of 66KV power receiving panel 13
13e and the non-maintenance surface 15c of the 66KV DS board 15 are brought into close contact with each other and connected with bolts (not shown). In this case, door 13
a and the surface of the door 15a are the same. This allows 66KV
Although the mechanical connection of the C-GIS 10 is completed, when viewed in a plane, this state has a shape as if "E" is turned sideways, and is a switchgear for front and side maintenance.

Next, an electrical connection method of the main circuit will be described. A bus connection device known in Japanese Patent Application Laid-Open No. 60-160309 is attached to the ceiling of each panel, and is electrically connected by a cable. That is, the 66KV power receiving panel 13 is provided with three-phase bus connecting devices 23a, and the 66KV PCT panel 14 is provided with three-phase bus connecting devices 23b.
Connect 3a and 23b with cable 24a. This allows PCT 12
Is completed on the primary side. The 66KV PCT panel 14 is equipped with a bus connection device 23c for two phases.
A bus connection device 23d for each phase is attached, and both bus connection devices 23c and 23d are connected by a cable 24b. This allows
Two current elements of the PCT 12 are connected. Where PCT 12
Voltage elements need only be electrically connected.
The KV power receiving panel 13 is connected to the 66KV DS panel 15 via a cable 24c from the opposite side of the bus connection device 23a arranged in the middle phase. Thus, the connection on the secondary side of the PCT 12 is completed.

Thus, the electrical and mechanical connection work of the 66KV C-GIS 10 has been completed.

The 66KV switchgear 11 for power distribution includes two 66KV power receiving panels 25, one 66KV bus communication panel 26, and a 66KV internal transformer panel.
27 has one surface, and 66KV distribution board 28 has four surfaces. The distribution board 28 has a structure in which circuit breakers 29 can be stacked in three stages. Each panel has a well-known structure, and has a front maintenance type structure in which a front door 30 is provided so that internal inspection / maintenance, operation of a circuit breaker, and the like can be performed, and a rear surface is a non-maintenance surface. . These boards are arranged in a row and mechanically connected by bolts (not shown), and electrical connection between the boards is performed via a bus (not shown) provided on a ceiling portion in the board. ing.

Thus, the electrical and mechanical connection work of the 6.6 KV distribution switchgear 11 is completed.

Next, 66KV C-GIS 10 and 6.6KV switchgear 11 for power distribution
66KV C-GIS 10 with a row of panels explaining the connection of
(A lower surface in FIG. 2) 31a and a rear surface 31b of the 6.6 KV switchgear 11 for power distribution are non-maintenance surfaces. The two non-maintenance surfaces 31a and 31b are brought into close contact with each other back to back, and are connected by bolts (not shown).

As described above, the 66 KV C-GIS 10 and the 6.6 KV switchgear 11 for power distribution are mechanically connected and integrated.

The electrical connection is 66KV C-GIS 10 and 6.6KV for power distribution.
The transformer 2 is connected between the switch gears 11. FIG. 3 is a sectional view taken along the line AA of FIG.

As shown in the figure, 66KV D that constitutes 66KV C-GIS 10
A cable head 35 is attached to the S board 15, and is connected to the primary bushing of the transformer via a 66KV cable 36 connected to the cable head 35. A 6.6 KV cable 37 connected to a secondary bushing of a transformer (not shown) is connected to a 6.6 KV switchgear 11 for power distribution.
Connected to the cable connection part 38 of the KV power receiving board 25. The transformer 2 is installed at an arbitrary location around the grouped 66 KV C-GIS 10 and the 6.6 KV switchgear 11 for power distribution.

66KV C-GIS 10 and power distribution 6.
FIG. 4 is a perspective view of the 6KV switchgear 11.

Although the above description has been made on the main circuit, the connection of the control circuit can be made inside the switchgear.

With the above configuration, the space for maintenance and inspection of the substation equipment can be reduced, and the pits for laying cables can be shared.

Therefore, the installation area of the 66KV / 6.6KV substation equipment can be greatly reduced, and the pit construction can be reduced by using the cable pits in common, which can greatly reduce the site purchase cost, construction cost, and construction period of the substation equipment.

In the embodiment described above, the voltage on the secondary side of the transformer is set to 6.
Although it was set to 6 KV, it goes without saying that the present invention can be applied to any of 22 KV, 440 V and 220 V.

〔The invention's effect〕

As described above, according to the present invention, it is possible to reduce the installation area of the substation equipment and the on-site construction period, and to reduce the overall cost. In particular, in recent years, substation facilities for buildings in large cities have high land, short construction period, and many electronic devices such as computers. Even the reliability has improved. In addition, cubicle-type switchgears as substation facilities in buildings are also excellent in environmental harmony.

[Brief description of the drawings]

FIG. 1 is a single-line connection diagram of one embodiment of the present invention, FIG. 2 is a plan view showing a partially cut-away embodiment of one embodiment of the present invention, and FIG.
4 is a perspective view of FIG. 2, FIG. 5 is a perspective view of a conventional substation, and FIG. 6 is a plan view of FIG. 2 ... Transformer, 4 ... Maintenance space 10 ... 66KV switchgear for power reception 11 ... 6.6KV switchgear for power distribution

──────────────────────────────────────────────────続 き Continuing on the front page (72) Nobuo Masaki, Inventor No. 1, Toshiba-cho, Fuchu-shi, Tokyo Inside the Toshiba Fuchu Plant, Inc. (72) Inventor Masaki Ikuta, No. 1 Toshiba-cho, Fuchu-shi, Tokyo (72) Inventor Mamoru Mikami 1 Toshiba-cho, Fuchu-shi, Tokyo Tokyo, Japan Inside the Toshiba Fuchu Plant, Inc. (72) Inventor Shiro Otake 1 Toshiba-cho, Fuchu-shi, Tokyo Inside, Toshiba Fuchu Plant, Inc. (56) Reference Reference JP-A-54-44739 (JP, A) JP-A-63-81605 (JP, U) JP-A-58-124002 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) H02B 7/06 H02B 1/015

Claims (1)

(57) [Claims] 1. In a collective substation comprising a special high-voltage switchgear for power reception, a transformer, and a switchgear for power distribution, the switchgear for power distribution is a front-maintenance type, and the special high-voltage switchgear for power reception is Front and side maintenance type, in which the non-maintenance surfaces of both switch gears are abutted and physically connected and fixed, and the length between the end portions of the abutting portions of the two switch gears is made substantially equal, A collective substation facility, wherein a maintenance surface of the power distribution switchgear is disposed outside the collective substation facility.